posted on Dec, 21 2005 @ 02:47 PM
Well, I haven't played Half Life 2 but know quite a bit about the storyline.
One theory is that the G Man is actually Gordon Freeman from the future who has gone back in time to help himself.
they both include each others names.
Apparently their eyes are the same colour.
Also at the end of HL2, I think the G-Man says "We've been watching you Gordon, and people will pay for your services." or something along those